Tài liệu tham khảo WikiPedia: Ole von Beust http://www.citymayors.com/germany/hamburg.html http://www.bundesrat.de/cln_051/nn_9020/DE/organe-... https://id.loc.gov/authorities/names/no2001038664 https://d-nb.info/gnd/120533081 https://web.archive.org/web/20070328210717/http://... https://web.archive.org/web/20080625094144/http://... https://isni.org/isni/0000000042312118 https://viaf.org/viaf/77148699 https://www.wikidata.org/wiki/Q60426#identifiers https://commons.wikimedia.org/wiki/Ole_von_Beust?u...
